Plug and socket for coaxial lines



Dec. 31, 1940. F. BERToLD PLUG AND SOCKET FOR COAXIAL LINES Filed July24, 1937 INVENTOR FR/TZ BERTOLD BY V ATTORNEY Patented Dec. 31, 1940UNITED STATES PLUG AND SOCKET FOR COAXIAL LINES AFritz Bertola,

Berlin-Niederschonewede, Germany, assignor to Allgemeine ElektricitatsGesellschaft, Berlin, Germany, a corporation of Germany Application July24, 1937, Serial No. 155,401 In Germany July 27, 1936 claims.

This invention relates to an improved system of providing coaxial lineswith interchangeable .plugs and sockets.

An object of this invention is an adapter plug 5 for connectingl acoaxial radio frequency line with standard plug sockets which at one endthereof is sui-ted to be connected with a coaxial radio frequency cablebush, while at its opposite end it is furnished with a plurality o-fstandard sockets.

A further object of this invention offers the advantage that by its aida great number of connections may be established with theV coaxial bushwhich is normally diilcultly accessible. It

may be used wherever special shielding of the lines is not necessary.

Another object of this invention is a plug socket for coaxial lines inwhich for the purpose ,of insulating the inner conductor against theouter conductor, disks consisting preferably of Polystyrol, or ofanother insulating material, are used. Polystyrol is an insulatingmaterial of special high quality, but it has the serious dis- 25.advantage that it is very brittle so that diiiiculties are encounteredwhen it is to be worked. In the subject matter of the novelty, this factis taken into consideration and a novel construction is shown bywhichthe load of the Polystyrol disk is reduced lto the farthest degree.

Still another object of this invention is a connectionplug with anexchangeable center piece for cga/irial lines for laboratory work. It\con sists of a cylindrical center piece and two tubular i partsdesigned as plugs. The tubular parts are connected with the center piecebyl means of a connection piece formed as a rectangular box, or combinedas a round body with the tubular part. This construction aifords thatduring tests, the

4 connection plug can be lgiven quickly and conveniently the requiredlength through insertion of a suitable center piece.

One phase of this invention is concerned with an adapter plug which isdesigned in a simple manner to establish connections from a coaxialradio frequency cable socket by means of standard plugs and sockets.

This invention will best be understood by referring to the 'accompanyingdrawing, in which:

Fig. 1 is a sectional view ofthe improved plug of this invention;

Fig. 2 is a plan view of Fig. 1;

Fig. 3 is a longitudinal'section of a socket of this invention; and

Fig. 4 is a cross-section of the socket of this invention partly inelevation.

Referring now in detail to Figs. 1 and 2 of the drawing, the plugportion consists of a cylindrical tubular member |A in the axis of whicha 5 metal rod 2 is locked by the aid of a cylindrical linsulating piece3. The said metal rod at one end thereof which projects beyond `thetubular member has the shape of a banana type plug 4, while at its otherend, which also prctrudes be- 10 yond the tubular piece, it has the formof a banana type socket 5. The cylindrical insulation member 3 projectsat one end beyond the tubular piece, I; it terminates in a cone-shapedpart 6 and a circular diskl which may be of any 15 other suitableconfiguration. In the center of the said disk is disposed theabove-mentioned banana plug socket 5. In symmetric relation to the saidsocket, in line with adiameter thereof are embedded in the disk twoadditional sockets 20 9 and ID, and these are united with the tubularImetal member I by soldered lugs and screws I2. The central bush ismarked by a colored ring 8. lAround the periphery of the disk there maybe arranged any desired number of sockets, and these may be associatedboth with the in- ,ner as Well as with the outer conductor; The

insulating piece 3 is secured to the metal tube piece I by means of`screws I2 projecting beyond the wall of tube l. 30 A plug socketportion according to the novel feature is shown by Fig. 3 and Fig. 4 ofthe drawing. 'The metallic sleeve 2| serves as outer conductor. In thissleeve 2| a further metal tube 22 is inserted whose upper end has theshape 35 of a flange designated by 23. The sleeve I has at its lower endan annular attachment 24 on which the Polystyrol disk 25 rests. Theringshaped collar 26 of the tubular part 22 presses the disk 2s sugnuyagainst the ring 2|. A1; the 4 place of the collar 26 the sleeve 2| andthe tube 22 are connected together by screws 2l. Furthermore, the tube22 and the sleeve 2| have opposite apertures in which the springs 28 arear- 45 ranged. At Ithe place 29 these springs are joined with the tube22 bymeans of spot welding. In the axial bore of the disk 25 the prongsocket 30 is situated provided in the usual manner with screws andsoldering ears. prong socket 30 has a smaller height than thecollar-like ring 26 0f the tube 22, so that the prong appertaining tothis socket rests with its A outer conductor on the collar 26, but doesnot touch the head 3| with any abutment of the 65 The head 3| of the 5oinner conductor. The Polystyrol disk 25 in this manner is freed to awide degree from any pressure stress. The entire plug socket is loweredinto the iront plate at the assembling, and only at flange 23 is itfastened with screws.

What is claimed is:

l. An adapter connection plug for connecting a radio frequencyconcentric cable having an inner and an outer conductor comprising acentral insulation core having an upper conical portion and discportion, a metallic member for said inner conductor passing through thecenter of said core the lower end of which projects beyond saidinsulation core forming a. plug having a plurality of spring members,the upper end f said conductor having a socket which projects withinsaid central insulation core and adapted to receive a spring plugmember, a tubular metallic member covering a major portion of theoutside of said insulation core and extending up to said conicalportion, a plurality of sockets located on the disc portion of saidcentral insulation core and adjacent said lrst mentioned socket, saidsecond mentioned sockets being connected to said tubular metallic memberfor cooperating with said first mentioned socket to form an outerconnection with the outer conductor of said high frequency concentriccable.

2. An adapter connection plug for connecting a radio frequencyconcentric cable having an inner and an outer conductor comprising acentral insulation core the upper portion of which is cone-shaped, ametallic member for said inner conductor passing through the center ofsaid core the lower end of which projects beyond said insulation coreforming a plug having a plurality of spring memberathe upper end of saidconductor having a socket which projects within said central insulationcore and adapted to receive a 40 spring plug member, a tubular metallicmember covering a major portion of the outside portion of saidinsulation core and extending upward to said cone-shaped upper portion,two sockets located on the upper portion of said central insula- 45 tioncore and adjacent said iirst mentioned sock- 60 least one et, saidsecond mentioned sockets being connected to said tubular metallic memberfor cooperating with said rst mentioned socket to form anv outerconnection with the outer conductor of said high frequency concentriccable.

3. An adapter plug and socket portion for connecting a radio frequencyconcentric cable having an inner and an outer conductor comprising acentral insulation core, a metallic member for said inner conductorpassing through the center of said insulation core, the lower end ofsaid conductor projecting beyond said insulation core and forming a plughaving a plurality of spring members. the upper end of said conductorhaving at socket member which projects within said central insulationcore and adapted to receive a spring plug member, a tubular metallicmember covering a major portion of the outside oi. said insulation core,said plug cooperating with two metallic sleeves telescoping within eachother to form 'said socket portion, an insulation disc secured to saidsocket portion by said sleeves, a socket member secured to saidinsulation disc, and a ilange for securing said socket portion formedfrom the upper portion of the innermost sleeve.

4. An adapter plug and socket portion for connecting a radio frequencyconcentric cable having an inner and an outer conductor comprising acentral insulation core, a metallic member for said inner conductorpassing through the center of said insulation core, the lower end ofsaid conductor projecting beyond said insulation core and forming a plughaving a plurality of spring members, the upper end of said conductorhaving at least one socket member which projects Within said centralinsulation core and adapted to receive a spring plug member, a tubularmetallic member covering a major portion of the outside of saidinsulation core, two other socket members located each side of saidfirst mentioned socket member and connected to said tubular metallicmember, said plug cooperating with two metallic sleeves telcoping withineach other to form said socket portion, an insulation disc secured to'said socket portion by said sleeves, a socket member secured tosaid'insulation disc. and a flange for securing said socket portionformed from the up- I per portion of the innermost sleeve.

5. An adapter plug and socket portion for connecting a radio frequencyconcentric cable having an inner and an outer conductor comprising acentral insulation core, a meallic member for said inner conductorpassing through the center of said insulation core, the lower end ofsaid conductor projecting beyond said insulation core and forming a plughaving a plurality oi spring members, the upper end of said conductorhaving at least one socket member which projects within said centralinsulation core and adapted to receive a spring plug member, a tubularmetallic member covering a major portion of the outside of saidinsulation core, and at least one other socket member adjacent saidilrst mentioned socket member and connected to said tubular metallicmembensaid plug cooperating with two metallic sleeves telescoping withineach other to form said socket portion, an insulation disc secured tosaid socket portion by said sleeves, a socket member secured to saidinsulation disc, and a flange for securing said socket portion formedfrom the upper portion of the innermost sleeve.

FRITZ BERTOLD f

